It happened in the third round Swiss Qualification of the 2018 National Youth Bridge Championship.   Board 7  Vul: Both  Dealer: South  South  ♠ A 3 2                       South     West     North     East  ♡ A 6                            1♣        pass       1♡        2♢   ♢ A Q 6                        pass      pass        X         pass  ♣ T 9 7 6 2                  3NT         AP   I really don't understand why South bids 3NT, even if she is my teammate. North makes a balancing to keep bid on. Maybe North just wants to reach a part score deal depending on go...